android - Just Published 1st App. It works fine on my Nexus 4 Running 4.2, but friend says it crashes on shake on her Electrify M Motorola running 4.1 -

i have question , appreciate help.

my friend says app crashes onshake. first app simple magic 8 ball app, gives random answer when user shakes it. says after opens app, , shakes app instead of receiving random answer on nexus 4, app shutsdown , takes home screen.

here's code think may causing it. added "finish(); shut down activity after user hits homescreen, clear out randomly generated answer instead of storing days.

@override public void onpause() {     super.onpause();     msensormanager.unregisterlistener(mshakedetector);     finish(); 

try crash log, including complete stack trace. easiest way asking friend send crash report when android asks him. otherwise plug phone computer, crash app , copy output of adb logcat. crash log should pinpoint line in code causes crash.

if sure problem in onpause method, check how initialize msensormanager. there way might null (not initialized) on friend's phone? (as cause nullpointerexception.)